<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程详情 开始 -->
    <section class="container">
      <section class="path-wrap txtOf hLh30">
        <a href="#" title class="c-999 fsize14">{{ courseInfoVo.subjectLevelOne }}</a>
        \
        <a href="#" title class="c-999 fsize14">{{ courseInfoVo.subjectLevelTwo }}</a>
        \
        <span class="c-333 fsize14">{{ courseInfoVo.title }}</span>
      </section>
      <div>
        <article class="c-v-pic-wrap" style="height: 357px;">
          <section class="p-h-video-box" id="videoPlay">
            <img style="height: 357px;" :src="courseInfoVo.cover" :alt="courseInfoVo.title" class="dis c-v-pic">
          </section>
        </article>
        <aside class="c-attr-wrap">
          <section class="ml20 mr15">
            <h2 class="hLh30 txtOf mt15">
              <span class="c-fff fsize24">{{ courseInfoVo.title }}</span>
            </h2>
            <section class="c-attr-jg">
              <span class="c-fff">价格：</span>
              <b v-if="Number(courseInfoVo.price) == 0" class="c-yellow" style="font-size:24px;">￥0.00</b>
              <b v-else class="c-yellow" style="font-size:24px;">￥{{ courseInfoVo.price }}</b>
            </section>
            <section class="c-attr-mt c-attr-undis">
              <span class="c-fff fsize14">主讲： {{ courseInfoVo.teacherName }}&nbsp;&nbsp;&nbsp;</span>
            </section>
            <section class="c-attr-mt of">
              <span class="ml10 vam">
                <em class="icon18 scIcon"></em>
                <a class="c-fff vam" title="收藏" href="#" >收藏</a>
              </span>
            </section>
            <section class="c-attr-mt">
              <a v-if="isBuy || Number(courseInfoVo.price) == 0" href="#" title="立即观看" class="comm-btn c-btn-3">立即观看</a>
              <a v-else href="#" title="立即购买" @click="createOrder()" class="comm-btn c-btn-3">立即购买</a>
            </section>
          </section>
        </aside>
        <aside class="thr-attr-box">
          <ol class="thr-attr-ol">
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">购买数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{ courseInfoVo.buyCount }}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">课时数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{ courseInfoVo.lessonNum }}</h6>
              </aside>
            </li>
            <li>
              <p>&nbsp;</p>
              <aside>
                <span class="c-fff f-fM">浏览数</span>
                <br>
                <h6 class="c-fff f-fM mt10">{{ courseInfoVo.viewCount }}</h6>
              </aside>
            </li>
          </ol>
        </aside>
        <div class="clear"></div>
      </div>
      <!-- /课程封面介绍 -->
      <div class="mt20 c-infor-box">
        <article class="fl col-7">
          <section class="mr30">
            <div class="i-box">
              <div>
                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                  <a name="c-i" class="current" title="课程详情">课程详情</a>
                </section>
              </div>
              <article class="ml10 mr10 pt20">
                <div>
                  <h6 class="c-i-content c-infor-title">
                    <span>课程介绍</span>
                  </h6>
                  <div class="course-txt-body-wrap">
                    <section class="course-txt-body">
                      <p v-html="courseInfoVo.description">
                        {{ courseInfoVo.description }}
                      </p>
                    </section>
                  </div>
                </div>
                <!-- /课程介绍 -->
                <div class="mt50">
                  <h6 class="c-g-content c-infor-title">
                    <span>课程大纲</span>
                  </h6>
                  <section class="mt20">
                    <div class="lh-menu-wrap">
                      <menu id="lh-menu" class="lh-menu mt10 mr10">
                        <ul>
                          <!-- 文件目录 -->
                          <li class="lh-menu-stair" v-for="chapters in chaptersAndVideos" :key="chapters.id">
                            <a href="javascript: void(0)" :title="chapters.title" class="current-1">
                              <em class="lh-menu-i-1 icon18 mr10"></em>{{ chapters.title }}
                            </a>
                            <ol class="lh-menu-ol" style="display: block;">
                              <li class="lh-menu-second ml30" v-for="videos in chapters.children" :key="videos.id">
                                <a :href="'/player/'+videos.videoSourceId" :title="videos.title" target="_blank">
                                  <span class="fr">
                                    <i class="free-icon vam mr10">免费试听</i>
                                  </span>
                                  <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em>{{ videos.title }}
                                </a>
                              </li>
                            </ol>
                          </li>
                        </ul>
                      </menu>
                    </div>
                  </section>
                </div>
                <!-- /课程大纲 -->
              </article>
            </div>
          </section>
        </article>
        <aside class="fl col-3">
          <div class="i-box">
            <div>
              <section class="c-infor-tabTitle c-tab-title">
                <a title href="javascript:void(0)">主讲讲师</a>
              </section>
              <section class="stud-act-list">
                <ul style="height: auto;">
                  <li>
                    <div class="u-face">
                      <a href="#">
                        <img :src="courseInfoVo.avatar" width="50" height="50" alt>
                      </a>
                    </div>
                    <section class="hLh30 txtOf">
                      <a class="c-333 fsize16 fl" href="#">{{ courseInfoVo.teacherName }}</a>
                    </section>
                    <section class="hLh20 txtOf">
                      <span class="c-999">{{ courseInfoVo.intro }}</span>
                    </section>
                  </li>
                </ul>
              </section>
            </div>
          </div>
        </aside>
        <div class="clear"></div>
      </div>
    </section>
    <!-- /课程详情 结束 -->
    <div class="mt50 commentHtml"><div>
      <h6 class="c-c-content c-infor-title" id="i-art-comment">
        <span class="commentTitle">课程评论</span>
      </h6>
      <section class="lh-bj-list pr mt20 replyhtml">
        <ul>
          <li class="unBr">
            <aside class="noter-pic">
              <img width="50" height="50" class="picImg" src="~/assets/img/avatar-boy.gif">
              </aside>
            <div class="of">
              <section class="n-reply-wrap">
                <fieldset>
                  <textarea name="" v-model="comment.content" placeholder="输入您要评论的文字" id="commentContent"></textarea>
                </fieldset>
                <p class="of mt5 tar pl10 pr10">
                  <span class="fl "><tt class="c-red commentContentmeg" style="display: none;"></tt></span>
                  <input type="button" @click="addComment()" value="回复" class="lh-reply-btn">
                </p>
              </section>
            </div>
          </li>
        </ul>
      </section>
      <section class="">
          <section class="question-list lh-bj-list pr">
            <ul class="pr10">
              <li v-for="(comment,index) in data.comments" v-bind:key="index">
                  <aside class="noter-pic">
                    <img width="50" height="50" class="picImg" :src="comment.avatar">
                    </aside>
                  <div class="of">
                    <span class="fl"> 
                    <font class="fsize12 c-blue"> 
                      {{comment.nickname}}</font>
                    <font class="fsize12 c-999 ml5">评论：</font></span>
                  </div>
                  <div class="noter-txt mt5">
                    <p>{{comment.content}}</p>
                  </div>
                  <div class="of mt5">
                    <span class="fr"><font class="fsize12 c-999 ml5">{{comment.gmtCreate}}</font></span>
                  </div>
                </li>
              
              </ul>
          </section>
        </section>
        
        <!-- 公共分页 开始 -->
        <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="首页"
            @click.prevent="gotoPage(1)">首</a>
            <a
            :class="{undisable: !data.hasPrevious}"
            href="#"
            title="前一页"
            @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
            v-for="page in data.pages"
            :key="page"
            :class="{current: data.current == page, undisable: data.current == page}"
            :title="'第'+page+'页'"
            href="#"
            @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="后一页"
            @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
            :class="{undisable: !data.hasNext}"
            href="#"
            title="末页"
            @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
        </div>
        <!-- 公共分页 结束 -->
      </div>
    </div>
  </div>
</template>

<script>
import course from '@/api/course'
import comment from '@/api/comment'
import order from '@/api/order'
export default {
  asyncData({ params, error }) {
    return { courseId: params.id }
  },
  data() {
    return {
      data: {},
      page: 1,
      limit: 4,
      total: 10,
      comment: {
        content: '',
        courseId: ''
      },
      courseInfoVo: {},
      chaptersAndVideos: {},
      isBuy: false,
      isbuyCourse: false
    }
  },
  created() {
    this.queryCourseInfoVoByCourseId()
    this.queryAllCommentPage()
  },
  methods: {

    // 立即购买按钮
    createOrder() {
      order.insertOrderByCourderIdAndUserId(this.courseId)
        .then(response => {
          if (response.data.success) {
            // 带参数跳转
            this.$router.push({path: '/order/' + response.data.data.orderId})
          }
        })
    },

    // 根据课程id查询课程详情信息
    queryCourseInfoVoByCourseId() {
      course.queryCourseInfoVoByCourseId(this.courseId)
        .then(response => {
          this.courseInfoVo = response.data.data.courseInfoVo,
          this.chaptersAndVideos = response.data.data.chaptersAndVideos
          this.isBuy = response.data.data.isBuy
        })
    },

    // 查询所有评论分页数据
    queryAllCommentPage() {
      comment.queryAllCommentPage(this.courseId, this.page, this.limit)
        .then(response => {
          this.data = response.data.data
        })
    },

    // 添加评论
    insertComment() {
      this.comment.courseId = this.courseId
      this.comment.teacherId = this.courseInfoVo.teacherId
      comment.insertComment(this.comment)
        .then(response => {
          if(response.data.code == 20002) {
            this.$message({
              type: 'error',
              message: response.data.message
            })
            // 跳转到登录页面
            this.$router.push({path: '/login'})
          }else {
            this.$message({
              type: 'success',
              message: '添加评论成功！'
            })
            // 重新查数据
            this.queryAllCommentPage()
          }
        })
    },

    // 点击回复按钮
    addComment() {
      this.insertComment()
    },

    // gotoPage
    gotoPage(page) {
      comment.queryAllCommentPage(page, this.limit)
        .then(response => {
          this.data = response.data.data
        })
    },
  },
};
</script>
